2122121226 has 64 divisors (see below), whose sum is σ = 4470681600. Its totient is φ = 670627776.

The previous prime is 2122121189. The next prime is 2122121227. The reversal of 2122121226 is 6221212212.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2122121227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3614905 + ... + 3615491.

It is an arithmetic number, because the mean of its divisors is an integer number (69854400).

Almost surely, 2^2122121226 is an apocalyptic number.

2122121226 is an abundant number, since it is smaller than the sum of its proper divisors (2348560374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2122121226 is a wasteful number, since it uses less digits than its factorization.

2122121226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963.

The product of its digits is 384, while the sum is 21.

The square root of 2122121226 is about 46066.4870160511. The cubic root of 2122121226 is about 1285.0599730774.

Adding to 2122121226 its reverse (6221212212), we get a palindrome (8343333438).

The spelling of 2122121226 in words is "two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-six".